Gtk3: Fix memory leaks

chrome/browser/ui/libgtkui/gtk_util.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/libgtkui/gtk_util.h"
 
 #include <dlfcn.h>
 #include <gdk/gdk.h>
 #include <gdk/gdkx.h>
 #include <gtk/gtk.h>
@@ skipping 287 matching lines @@
       {"hover", GTK_STATE_FLAG_PRELIGHT},
       {"selected", GTK_STATE_FLAG_SELECTED},
       {"disabled", GTK_STATE_FLAG_INSENSITIVE},
       {"indeterminate", GTK_STATE_FLAG_INCONSISTENT},
       {"focus", GTK_STATE_FLAG_FOCUSED},
       {"backdrop", GTK_STATE_FLAG_BACKDROP},
       {"link", GTK_STATE_FLAG_LINK},
       {"visited", GTK_STATE_FLAG_VISITED},
       {"checked", GTK_STATE_FLAG_CHECKED},
   };
-  GtkStateFlags state =
-      context ? gtk_style_context_get_state(context) : GTK_STATE_FLAG_NORMAL;
+  GtkStateFlags state = GTK_STATE_FLAG_NORMAL;
   base::StringTokenizer t(css_node, ".:#");
   t.set_options(base::StringTokenizer::RETURN_DELIMS);
   while (t.GetNext()) {
     if (t.token_is_delim()) {
       if (t.token_begin() == css_node.begin()) {
         // Special case for the first token.
         gtk_widget_path_append_type(path, G_TYPE_NONE);
       }
       switch (*t.token_begin()) {
         case '#':
@@ skipping 47 matching lines @@
           break;
         }
       }
     }
   }
 
   // Always add a "chromium" class so that themes can style chromium
   // widgets specially if they want to.
   gtk_widget_path_iter_add_class(path, -1, "chromium");
 
+  if (GtkVersionCheck(3, 14)) {
+    static auto* _gtk_widget_path_iter_set_state =
+        reinterpret_cast<void (*)(GtkWidgetPath*, gint, GtkStateFlags)>(
+            dlsym(GetGtk3SharedLibrary(), "gtk_widget_path_iter_set_state"));
+    DCHECK(_gtk_widget_path_iter_set_state);
+    _gtk_widget_path_iter_set_state(path, -1, state);
+  }
+
   ScopedStyleContext child_context(gtk_style_context_new());
   gtk_style_context_set_path(child_context, path);
-  gtk_style_context_set_state(child_context, state);
+  if (GtkVersionCheck(3, 14)) {
+    gtk_style_context_set_state(child_context, state);
+  } else {
+    GtkStateFlags child_state = state;
+    if (context) {
+      child_state = static_cast<GtkStateFlags>(
+          child_state | gtk_style_context_get_state(context));
+    }
+    gtk_style_context_set_state(child_context, child_state);
+  }
   gtk_style_context_set_parent(child_context, context);
   gtk_widget_path_unref(path);
   return child_context;
 }
 
 ScopedStyleContext GetStyleContextFromCss(const char* css_selector) {
   // Prepend a window node to the selector since all widgets must live
   // in a window, but we don't want to specify that every time.
   auto context =
       AppendCssNodeToStyleContext(nullptr, "GtkWindow#window.background");
@@ skipping 141 matching lines @@
   }
 
   CairoSurface surface(gfx::Size(w, h));
   gtk_render_background(context, surface.cairo(), 0, 0, w, h);
   gtk_render_frame(context, surface.cairo(), 0, 0, w, h);
   return surface.GetAveragePixelValue(false);
 }
 #endif
 
 }  // namespace libgtkui